diff --git a/UIX/Microsoft/Iris/Debug/Symbols/DebugSymbolsJsonParser.cs b/UIX/Microsoft/Iris/Debug/Symbols/DebugSymbolsJsonParser.cs
index 0331f59..06c5375 100644
--- a/UIX/Microsoft/Iris/Debug/Symbols/DebugSymbolsJsonParser.cs
+++ b/UIX/Microsoft/Iris/Debug/Symbols/DebugSymbolsJsonParser.cs
@@ -1,14 +1,42 @@
 using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using System;
 
 namespace Microsoft.Iris.Debug.Symbols;
 
 public static class DebugSymbolsJsonParser
 {
-    public static ApplicationDebugSymbols ParseForApplication(string json) => JsonConvert.DeserializeObject<ApplicationDebugSymbols>(json);
+    private static JsonSerializerSettings _settings = new()
+    {
+        Converters = [new SourceSpanJsonConverter()],
+    };
 
-    public static FileDebugSymbols ParseForFile(string json) => JsonConvert.DeserializeObject<FileDebugSymbols>(json);
+    public static ApplicationDebugSymbols ParseForApplication(string json) =>
+        JsonConvert.DeserializeObject<ApplicationDebugSymbols>(json, _settings);
 
-    public static string Serialize(ApplicationDebugSymbols symbols) => JsonConvert.SerializeObject(symbols);
+    public static FileDebugSymbols ParseForFile(string json) =>
+        JsonConvert.DeserializeObject<FileDebugSymbols>(json, _settings);
 
-    public static string Serialize(FileDebugSymbols symbols) => JsonConvert.SerializeObject(symbols);
+    public static string Serialize(ApplicationDebugSymbols symbols) =>
+        JsonConvert.SerializeObject(symbols, _settings);
+
+    public static string Serialize(FileDebugSymbols symbols) =>
+        JsonConvert.SerializeObject(symbols, _settings);
+
+    private class SourceSpanJsonConverter : JsonConverter
+    {
+        public override bool CanConvert(Type objectType) => objectType == typeof(SourceSpan);
+
+        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+        {
+            var span = (SourceSpan)value;
+            JArray array = [span.Start, span.End];
+            array.WriteTo(writer);
+        }
+
+        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+        {
+            throw new NotImplementedException();
+        }
+    }
 }